Problem with multiple image tracking, Unity ARFoundation

Question

I'm working on a project that I need to track images on a catalog and show the respectives 3D models to each page. Nothing complex by now, just the functional demo. It needs to show a 3D model per time, show nothing when there isn't a reference image on the screen, and I need to be able to return to previous images. I couldn't find a code like that, even in the samples provided by Unity. I'm new at Unity and C# programming, so I'm having a hard time when trying to change codes I've found here and on YouTube.

using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;
public class ImageTracking2: MonoBehaviour
{
    public string ReferenceImageName;
    private ARTrackedImageManager _TrackedImageManager;
    private void Awake()
    {
        _TrackedImageManager = FindObjectOfType<ARTrackedImageManager>();
    }
    private void OnEnable()
    {
        if (_TrackedImageManager != null)
        {
            _TrackedImageManager.trackedImagesChanged += OnTrackedImagesChanged;
        }
    }
    private void OnDisable()
    {
        if (_TrackedImageManager != null)
        {
            _TrackedImageManager.trackedImagesChanged -= OnTrackedImagesChanged;
        }
    }
    private void OnTrackedImagesChanged(ARTrackedImagesChangedEventArgs e)
    {
        foreach (var trackedImage in e.added)
        {
            Debug.Log($"Tracked image detected: {trackedImage.referenceImage.name} with size: {trackedImage.size}");
        }
        UpdateTrackedImages(e.added);
        UpdateTrackedImages(e.updated);
    }
    private void UpdateTrackedImages(IEnumerable<ARTrackedImage> trackedImages)
    {
        // If the same image (ReferenceImageName)
        var trackedImage =
            trackedImages.FirstOrDefault(x => x.referenceImage.name == ReferenceImageName);
        if (trackedImage == null)
        {
            return;
        }
   
        if (trackedImage.trackingState != TrackingState.None)
        {
            var trackedImageTransform = trackedImage.transform;
            transform.SetPositionAndRotation(trackedImageTransform.position, trackedImageTransform.rotation);
        }
    }
}

This one above works well, somebody shared with the Unity Forum. But how can I make the game object disappear when the camera looses the reference, maybe after a second? (this is attached to the prefabs, individually. works perfectly, but the game objects of my 3D models keep forever on the screen once they get enabled). Thanks in advance.

Problem with multiple image tracking, Unity ARFoundation

0 Answers0